Comfortable ergonomic grip area on the hammer tube,for added comfort (in addition to the side handle) when chiseling in tight spaces or in a variety of positions. Variable speed trigger and variable speed dial,for controlled chiseling applications. SDS-max bit system, tool-free bit changes with automatic bit locking, dust protection and maximum impact energy transfer rate. Vario-lock to rotates and locks chisel in 12 different positions to optimize the working angle. 360° auxiliary side handle which is provides a wide range of movement along with operator comfort. 1-year limited warranty.